特別提醒：一定要注意文件結(jié)構(gòu)
webappapplication 一定要在包的最外層，否則spring無(wú)法對(duì)所有的類進(jìn)行托管，會(huì)造成@autowired 無(wú)法注入。
1. 添加工具類獲取在 spring 中托管的 bean
（1）工具類
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package com.common;import org.springframework.beans.beansexception;import org.springframework.beans.factory.nosuchbeandefinitionexception;import org.springframework.context.applicationcontext;import org.springframework.context.applicationcontextaware;/** * @program: ipc_1p * @description: 獲取在spring中托管的bean * @author: johnny * @create: 2018-08-03 16:24 **/public class springcontextutil { private static applicationcontext applicationcontext; // spring應(yīng)用上下文 // 下面的這個(gè)方法上加了@override注解，原因是繼承applicationcontextaware接口是必須實(shí)現(xiàn)的方法 public static void setapplicationcontext(applicationcontext applicationcontext) throws beansexception { springcontextutil.applicationcontext = applicationcontext; } public static applicationcontext getapplicationcontext() { return applicationcontext; } public static object getbean(string name) throws beansexception { return applicationcontext.getbean(name); } public static object getbean(string name, class requiredtype) throws beansexception { return applicationcontext.getbean(name, requiredtype); } public static boolean containsbean(string name) { return applicationcontext.containsbean(name); } public static boolean issingleton(string name) throws nosuchbeandefinitionexception { return applicationcontext.issingleton(name); } public static class gettype(string name) throws nosuchbeandefinitionexception { return applicationcontext.gettype(name); } public static string[] getaliases(string name) throws nosuchbeandefinitionexception { return applicationcontext.getaliases(name); }} |
（2）使用
1）程序啟動(dòng)時(shí)，實(shí)例化 springcontextutil
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@springbootapplicationpublic class webappapplication { private static applicationcontext applicationcontext; public static void main(string[] args) { applicationcontext = springapplication.run(webappapplication.class, args); // springcontextutil springcontextutil = new springcontextutil(); springcontextutil.setapplicationcontext(applicationcontext); system.out.println("服務(wù)器啟動(dòng)測(cè)試!");} |
2）在使用 @service 的方法中，通過(guò)@autowired 注入，使用springcontexutil 獲取bean上下文
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@autowired senderservice senderservice;public class package_state { @autowired senderservice senderservice; @component private package_state() { senderservice = (senderservice)springcontextutil.getbean("senderservice"); }} |
總結(jié)
以上所述是小編給大家介紹的解決springboot @autowired 無(wú)法注入問(wèn)題，希望對(duì)大家有所幫助，如果大家有任何疑問(wèn)請(qǐng)給我留言，小編會(huì)及時(shí)回復(fù)大家的。在此也非常感謝大家對(duì)服務(wù)器之家網(wǎng)站的支持！
原文鏈接：https://www.cnblogs.com/sylarken/archive/2018/08/07/9435076.html
